[Letux-kernel] Charging on GTA04

H. Nikolaus Schaller hns at goldelico.com
Mon Jun 27 22:35:36 CEST 2016


Hi Marek,

> Am 27.06.2016 um 22:26 schrieb Belisko Marek <marek.belisko at gmail.com>:
> 
> Hi Nikolaus,
> 
> I build fresh 4.7-rc5-letux (make mrproper ARCH=arm; make
> letux_defconfig ARCH=arm) boot device and twl4030_usb is reporting:
> root at letux:~# cat /sys/class/power_supply/twl4030_usb/status
> Charging
> root at letux:~# cat /sys/class/power_supply/twl4030_usb/voltage_now
> 4961175
> root at letux:~# cat /sys/class/power_supply/twl4030_usb/current_now
> 509352

looks good!

> 
> genric-adc-battery has bug that despite of fact that twl4030 report
> charging generic adc-batt report discharging.

Yes, but that is not the real problem.

> Also eth gadget works
> for me. Strange.

Indeed. Hm...

The strange thing is that it does not work for me for 4.6.0 or 4.7-rc*
But 4.3 worked immediately.

Well, does WiFi work for you? On my devices it is broken. And that
might disturb something.

And does HDQ / bq27000 work for you?

BR,
Nikolaus

> 
> 
> On Mon, Jun 27, 2016 at 8:15 PM, H. Nikolaus Schaller <hns at goldelico.com> wrote:
>> 
>>> Am 27.06.2016 um 20:06 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>> 
>>> Hi all,
>>> I have not found the issue, but a "good" kernel where works:
>>> 
>>> a) hdq / bq27000
>>> b) ip over usb
>>> c) charging
>>> 
>>> What is also not working is USB plug-in detection with the long cable...
>>> 
>>> Anyways, we have a "good" and a "bad" kernel. Let's start to diff
>> 
>> some first observations:
>> - bq27xxx driver has been completely rewritten. There were bugs for other
>>  fuel gauge chips and there might still be one for bq27000.
>> - twl4030_charger.c has been converted to use iio madc for VAC and
>>  replaced non-standard sysfs nodes by standard ones
>> 
>>> and
>>> find out what is going wrong :)
>>> 
>>>      good: http://download.goldelico.com/letux-kernel/4.3/
>>>      bad: http://download.goldelico.com/letux-kernel/letux-4.7-rc5/
>>> 
>>> What I suspect from this is that some editing of a feature branch (especially
>>> the charger code) did go wrong.
>> 
>> One thing is still different: the sequence of initializing interrupts and registering
>> the charger. I remember that these patches got garbled a little by rebasing
>> so I had to reconstruct them. Maybe that is the issue.
>> 
>> But it can still be completely somewhere else!
>> 
>> BR,
>> Nikolaus
>> 
>>> 
>>> BR,
>>> Nikolaus
>>> 
>>> 
>>> 
>>>> Am 26.06.2016 um 22:14 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>> 
>>>> 
>>>>> Am 26.06.2016 um 19:36 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>> 
>>>>> 
>>>>>> Am 26.06.2016 um 18:43 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>> 
>>>>>> 
>>>>>>> Am 26.06.2016 um 18:07 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>> 
>>>>>>> 
>>>>>>>> Am 26.06.2016 um 17:12 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>>> 
>>>>>>>> 
>>>>>>>>> Am 26.06.2016 um 15:01 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>>> Am 24.06.2016 um 10:03 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>>>>> 
>>>>>>>>>> Hi,
>>>>>>>>>> it appears as if USB detection is now completely broken on -rc4...
>>>>>>>>>> 
>>>>>>>>>> I have two boards where I neither get some "USB plugged in" nor
>>>>>>>>>> does /sys/class/power/usb start charging.
>>>>>>>>>> 
>>>>>>>>>> Something has gone wild.
>>>>>>>>>> 
>>>>>>>>>> Does it work for anyone of you?
>>>>>>>>> 
>>>>>>>>> Here some observations to this problem (using letux-4.7-rc4):
>>>>>>>>> 
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat uevent
>>>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>>>> POWER_SUPPLY_STATUS=Not charging
>>>>>>>>> POWER_SUPPLY_ONLINE=0
>>>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=841
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# echo continuous >mode
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat mode
>>>>>>>>> off auto [continuous]
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat uevent
>>>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>>>> POWER_SUPPLY_STATUS=Charging
>>>>>>>>> POWER_SUPPLY_ONLINE=1
>>>>>>>>> POWER_SUPPLY_VOLTAGE_NOW=0
>>>>>>>>> POWER_SUPPLY_CURRENT_NOW=12474
>>>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=841
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# echo auto >mode
>>>>>>>>> [  189.735412] twl4030_bci 48070000.i2c:twl at 48:bci: battery temperature out of range
>>>>>>>>> [  189.766967] twl4030_bci 48070000.i2c:twl at 48:bci: battery temperature out of range
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat uevent
>>>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>>>> POWER_SUPPLY_STATUS=Not charging
>>>>>>>>> POWER_SUPPLY_ONLINE=0
>>>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=841
>>>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb#
>>>>>>>>> 
>>>>>>>>> This means:
>>>>>>>>> 1.  "auto" mode is broken
>>>>>>>>> 2. continuous mode seems to charge
>>>>>>>>> 3. switching back to auto mode gives strange "battery temperature out of range" warning
>>>>>>>>> 
>>>>>>>>> And I have no ethernet-gadget.
>>>>>>>>> 
>>>>>>>>> I think I should compare with letux-4.6.0 or other -rc. And I should enable debugging
>>>>>>>>> of the driver.
>>>>>>>> 
>>>>>>>> Well, 4.6.0 isn't charging as well (and no ethernet gadget). And older versions are not properly booting.
>>>>>>>> 
>>>>>>>> One strange observation:
>>>>>>>> 
>>>>>>>> root at letux:~# cat /sys/class/power_supply/twl4030_usb/voltage_now
>>>>>>>> 0
>>>>>>>> root at letux:~# cat /sys/class/power_supply/twl4030_usb/uevent
>>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>>> POWER_SUPPLY_STATUS=Charging
>>>>>>>> POWER_SUPPLY_ONLINE=1
>>>>>>>> POWER_SUPPLY_VOLTAGE_NOW=0
>>>>>>>> POWER_SUPPLY_CURRENT_NOW=808476
>>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=798505
>>>>>>>> root at letux:~#
>>>>>>>> 
>>>>>>>> This means that voltage_now and POWER_SUPPLY_VOLTAGE_NOW is 0 although charging!
>>>>>>>> 
>>>>>>>> This is definitively different to 4.6.0 where USB voltage is displayed.
>>>>>>>> 
>>>>>>>> Is perhaps the madc broken?
>>>>>>> 
>>>>>>> Yes and no...
>>>>>>> 
>>>>>>> This is what I get with #define DEBUG
>>>>>>> 
>>>>>>> root at letux:~# dmesg|fgrep bci
>>>>>>> [    8.864227] driver_register 'twl4030_bci'
>>>>>>> [    8.864868] twl4030_bci_probe
>>>>>>> [    8.864959] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    8.865020] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>>>> [    8.865051]   bci->transceiver = fffffdfb
>>>>>>> [    8.943939] twl4030_bci_probe
>>>>>>> [    8.944000] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    8.944061] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>>>> [    8.944091]   bci->transceiver = fffffdfb
>>>>>>> [    8.953796] twl4030_bci_probe
>>>>>>> [    8.953857] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    8.953918] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad220)
>>>>>>> [    8.953948]   bci->transceiver = fffffdfb
>>>>>>> [    8.973114] twl4030_bci_probe
>>>>>>> [    8.973175] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    8.973236] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad220)
>>>>>>> [    8.973266]   bci->transceiver = fffffdfb
>>>>>>> [    8.988189] twl4030_bci_probe
>>>>>>> [    8.988250] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    8.988311] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddd99320)
>>>>>>> [    8.988342]   bci->transceiver = fffffdfb
>>>>>>> [    9.232696] twl4030_bci_probe
>>>>>>> [    9.232788] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    9.232849] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddd99320)
>>>>>>> [    9.232849]   bci->transceiver = fffffdfb
>>>>>>> [    9.238159] twl4030_bci_probe
>>>>>>> [    9.238250] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    9.238281] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>>>> [    9.238311]   bci->transceiver = fffffdfb
>>>>>>> [    9.396270] twl4030_bci_probe
>>>>>>> [    9.396362] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    9.396392] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, dcac2f20)
>>>>>>> [    9.396423]   bci->transceiver = fffffdfb
>>>>>>> [    9.424865] twl4030_bci_probe
>>>>>>> [    9.424957] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    9.424987] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>>>> [    9.425018]   bci->transceiver = fffffdfb
>>>>>>> [    9.477874] twl4030_bci_probe
>>>>>>> [    9.477966] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    9.477996] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad120)
>>>>>>> [    9.478027]   bci->transceiver = fffffdfb
>>>>>>> [    9.530670] twl4030_bci_probe
>>>>>>> [    9.530761] twl4030_bci_probe: of_find_compatible_node
>>>>>>> [    9.530822] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad720)
>>>>>>> [    9.530853]   bci->transceiver = dca39410
>>>>>>> [    9.530883] twl4030_bci 48070000.i2c:twl at 48:bci: could not request vac iio channel -19
>>>>>>> [    9.546997] twl4030_bci 48070000.i2c:twl at 48:bci: transceiver = dca39410
>>>>>>> [    9.546997] twl4030_bci 48070000.i2c:twl at 48:bci: OTG notify 0
>>>>>>> [    9.548370] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.549224] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.549804] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.550292] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.550781] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.551300] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.552612] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.553131] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.553558] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.554046] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.554534] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.554992] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [    9.626617] twl4030_bci 48070000.i2c:twl at 48:bci: v=0 cur=-850000 limit=0 target=500000
>>>>>>> [   10.615722] twl4030_bci 48070000.i2c:twl at 48:bci: OTG notify 2
>>>>>>> [   12.135711] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.136260] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.136840] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.137390] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.137817] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.139190] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.139678] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.140136] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.140563] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.141021] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.143005] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.143524] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.143951] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.144409] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.144866] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.146545] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.146972] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.147460] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.147918] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.165832] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.168548] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.169006] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.169433] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.169860] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.170288] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.198486] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.201812] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.202239] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.202697] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.203155] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.211883] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.212341] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.212799] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.213226] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.213684] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.216888] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.217437] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.217895] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.219116] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.219635] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.419799] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.423065] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.423522] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.423980] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.424438] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.426727] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.427215] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.427642] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.428100] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.428558] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.430541] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.431182] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.431610] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.432067] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.432525] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.447662] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.448211] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.448669] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.449127] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [   12.449554] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> root at letux:~#
>>>>>>> 
>>>>>>> root at letux:~# echo auto >/sys/class/power_supply/twl4030_usb/mode
>>>>>>> [  280.254119] twl4030_bci 48070000.i2c:twl at 48:bci: BCI irq 00 08
>>>>>>> [  280.266662] twl4030_bci 48070000.i2c:twl at 48:bci: BCI irq 00 08
>>>>>>> [  280.279632] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> root at letux:~# [  280.288757] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.294769] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.303192] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.311340] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.319427] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.327392] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.334716] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.342620] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.356506] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.370605] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.387207] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.393249] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.403289] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.409912] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.418304] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.427124] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.439941] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.447601] twl4030_bci 48070000.i2c:twl at 48:bci: v=0 cur=9150 limit=0 target=500000
>>>>>>> [  280.452423] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.461273] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.465728] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.466339] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.466888] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.467437] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.467926] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.476196] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.488464] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.490081] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.502502] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.514495] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.557800] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.576171] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.586883] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.607116] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.622772] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.629150] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.638549] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.646270] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.652954] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.659973] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.667388] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.674468] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.681243] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.689605] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.700714] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.708557] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.716094] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.722961] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.731384] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.739349] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.747070] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.754119] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  280.761901] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> 
>>>>>>> root at letux:~# echo continuous >/sys/class/power_supply/twl4030_usb/mode
>>>>>>> root at letux:~# [  324.358245] twl4030_bci 48070000.i2c:twl at 48:bci: BCI irq 00 10
>>>>>>> [  324.371276] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.378295] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.385040] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.394165] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.401306] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.402191] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.414855] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.426727] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.441223] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.447875] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.455444] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.463897] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.471313] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.479522] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.488952] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.497528] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.511199] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.522888] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.534454] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.544067] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.551605] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.558898] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.566894] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.573669] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.581848] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.589080] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.597717] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.652496] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.659973] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.667877] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.677307] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> [  324.686981] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>>> 
>>>>>>> Really interesting is
>>>>>>> 
>>>>>>> [    9.530883] twl4030_bci 48070000.i2c:twl at 48:bci: could not request vac iio channel -19
>>>>>>> 
>>>>>>> Which means there is some error in the madc iio subsystem at that stage.
>>>>>> 
>>>>>> Well, the bug is in one of our DT patches:
>>>>>> 
>>>>>> <http://git.goldelico.com/?p=gta04-kernel.git;a=blob;f=arch/arm/boot/dts/twl4030.dtsi;h=0c862d2d7b5aa7e8460b91d143d6245a5c5a8da8;hb=f704c620abd294972e754c8b59a085191e411da8#l27>
>>>>>> 
>>>>>> this line should read
>>>>>> 
>>>>>>           io-channel-names = "vac";
>>>>>> 
>>>>>>> 
>>>>>>> The second observation is that there is nothing happening on USB plug/unplug.
>>>>>>> 
>>>>>>> IMHO USB-Plug detection is also broken (don't know if hw or software).
>>>>>> 
>>>>>> Interestingly, I see different OTG notify values depending on whether
>>>>>> the cable is plugged in during boot or not. But no new notifications if I
>>>>>> unplug the cable.
>>>>>> 
>>>>>> Well, that is only part of the truth:
>>>>>> 
>>>>>> * if I take a short USB cable I can see notify 0 and notify 2 (but still no charging nor ethernet gadget)
>>>>>> * if I take a long cable and plug/unplug at the hub end, I don't see notifications
>>>>>> * if I take a long cable and plug/unplug at the gta04 end, I see notifications
>>>>>> 
>>>>>> * MADC reports some mV only for VBUS
>>>>>> 
>>>>>> That is really weird.
>>>>>> 
>>>>>> What could this be (if not a hardware problem)?
>>>>> 
>>>>> unlikely. I have swapped the SD card to a different GTA04 and it shows the same effects
>>>>> (long vs. short cable, no charging).
>>>> 
>>>> HW problem can be definitively ruled out.
>>>> 
>>>> I have flashed a fresh SD card through
>>>> 
>>>>     wget -O - http://download.goldelico.com/gta04/production/20150318-gta04.dd.bz2 | bzcat >/dev/sdc
>>>> 
>>>> and that works perfectly (WARNING: it flashes an older U.Boot!).
>>>> 
>>>> After reflashing the previous U-Boot and booting 4.6.0 it appears that charging works a little better.
>>>> And I got sometimes Ethernet over USB capability.
>>>> 
>>>> But I also got strange problems when unplugging the USB cable:
>>>> 
>>>> root at letux:~# [  127.712615] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in b_idle (90, <VBusValid), retry #0, port1 00000100
>>>> 
>>>> Quite strange...
>>>> 
>>>> Will try 4.7-rc4 again tomorrow.
>>>> 
>>>>> 
>>>>> So please help to fix this!
>>>>> 
>>>>>> 
>>>>>> * USB/OTG detection is broken (some race between VBUS and D+/D- level detection on cable plug)
>>>>>> * charger is fully enabled (too high inrush-current) preventing VBUS to rising above the VBUS detection level
>>>>>>   with short cable I have 4.54V
>>>>>>   with long cable I have just 4.39V
>>>>>> * a bug in MADC so that VBUS is not reported properly
>>>>>> * is the OTG charge pump not being turned on/off?
>>>>>> 
>>>>>> More ideas?
>>>>>> 
>>>>>> BR,
>>>>>> Nikolaus
>>>>>> 
>>>>>> _______________________________________________
>>>>>> http://projects.goldelico.com/p/gta04-kernel/
>>>>>> Letux-kernel mailing list
>>>>>> Letux-kernel at openphoenux.org
>>>>>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
>>>>> 
>>>>> _______________________________________________
>>>>> http://projects.goldelico.com/p/gta04-kernel/
>>>>> Letux-kernel mailing list
>>>>> Letux-kernel at openphoenux.org
>>>>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
>>>> 
>>>> _______________________________________________
>>>> http://projects.goldelico.com/p/gta04-kernel/
>>>> Letux-kernel mailing list
>>>> Letux-kernel at openphoenux.org
>>>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
>>> 
>>> _______________________________________________
>>> http://projects.goldelico.com/p/gta04-kernel/
>>> Letux-kernel mailing list
>>> Letux-kernel at openphoenux.org
>>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
>> 
>> _______________________________________________
>> http://projects.goldelico.com/p/gta04-kernel/
>> Letux-kernel mailing list
>> Letux-kernel at openphoenux.org
>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
> 
> BR,
> 
> marek
> 
> -- 
> as simple and primitive as possible
> -------------------------------------------------
> Marek Belisko - OPEN-NANDRA
> Freelance Developer
> 
> Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
> Tel: +421 915 052 184
> skype: marekwhite
> twitter: #opennandra
> web: http://open-nandra.com
> _______________________________________________
> http://projects.goldelico.com/p/gta04-kernel/
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